Detection performance improvement of chirped amplitude modulation ladar based on Gieger-mode avalanche photoelectric detector

Zijing Zhang; Long Wu; Yu Zhang; Yuan Zhao; Xiudong Sun

doi:10.1364/AO.50.006522

Detection performance improvement of chirped amplitude modulation ladar based on Gieger-mode avalanche photoelectric detector

Appl Opt. 2011 Dec 10;50(35):6522-5. doi: 10.1364/AO.50.006522.

Authors

Zijing Zhang¹, Long Wu, Yu Zhang, Yuan Zhao, Xiudong Sun

Affiliation

¹ Department of Physics, Harbin Institute of Technology, No. 92, Xidazhi Road, Harbin 150001, China.

PMID: 22193131
DOI: 10.1364/AO.50.006522

Abstract

This paper presents an improved system structure of photon-counting chirped amplitude modulation (AM) ladar based on the Geiger-mode avalanche photoelectric detector (GmAPD). The error-pulse probability is investigated with statistical method. The research shows that most of the error pulses that are triggered by noise are distributed in the intensity troughs of the chirped AM waveform. The error-pulse probability is lowered with the sliding window and the threshold. With the average intensity of noise and signal being 0.3 count/sample and 1 count/sample, respectively, the probability of error pulses is reduced from 12% to 1.0%, and the SNR is improved by 2.2 dB in the improved system.